TY - JOUR
T1 - Accuracy assessment of FDTD method for the analysis of sub-wavelength photonic structures
AU - Ohtera, Yasuo
N1 - Publisher Copyright:
© 2016 The Institute of Electronics, Information and Communication Engineers.
Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 2016/7
Y1 - 2016/7
N2 - FDTD (Finite-Difference Time-Domain) method has been widely used for the analysis of photonic devices consisting of subwavelength structures. In recent years, increasing efforts have been made to implement the FDTD on GPGPUs (General-Purpose Graphic Processing Units), to shorten simulation time. On the other hand, it is widely recognized that most of the middle-and low-end GPGPUs have difference of computational performance, between single-precision and doubleprecision type arithmetics. Therefore the type selection of single/double precision for electromagnetic field variables in FDTD becomes a key issue from the viewpoint of the total simulation performance. In this study we investigated the difference of results between the use of single-precision and double-precision. As a most fundamental sub-wavelength photonic structure, we focused on an alternating multilayer (one dimensional periodic structure). Obtained results indicate that significant difference appears for the amplitudes of higher order spatial harmonic waves.
AB - FDTD (Finite-Difference Time-Domain) method has been widely used for the analysis of photonic devices consisting of subwavelength structures. In recent years, increasing efforts have been made to implement the FDTD on GPGPUs (General-Purpose Graphic Processing Units), to shorten simulation time. On the other hand, it is widely recognized that most of the middle-and low-end GPGPUs have difference of computational performance, between single-precision and doubleprecision type arithmetics. Therefore the type selection of single/double precision for electromagnetic field variables in FDTD becomes a key issue from the viewpoint of the total simulation performance. In this study we investigated the difference of results between the use of single-precision and double-precision. As a most fundamental sub-wavelength photonic structure, we focused on an alternating multilayer (one dimensional periodic structure). Obtained results indicate that significant difference appears for the amplitudes of higher order spatial harmonic waves.
KW - Computational accuracy
KW - FDTD method
KW - GPGPU
KW - Subwavelength periodic structure
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U2 - 10.1587/transele.E99.C.780
DO - 10.1587/transele.E99.C.780
M3 - Article
AN - SCOPUS:84976892505
VL - E99C
SP - 780
EP - 787
JO - IEICE Transactions on Electronics
JF - IEICE Transactions on Electronics
SN - 0916-8524
IS - 7
ER -